CN209676108U - A kind of signals of rotating transformer modulation circuit and motor driven systems - Google Patents
A kind of signals of rotating transformer modulation circuit and motor driven systems Download PDFInfo
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- CN209676108U CN209676108U CN201920040569.9U CN201920040569U CN209676108U CN 209676108 U CN209676108 U CN 209676108U CN 201920040569 U CN201920040569 U CN 201920040569U CN 209676108 U CN209676108 U CN 209676108U
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Abstract
The utility model provides a kind of signals of rotating transformer modulation circuit and motor driven systems, the signals of rotating transformer modulation circuit includes rotary transformer decoding chip, excitation signal modulation circuit, first common mode capacitance filter circuit, second common mode capacitance filter circuit, first common mode inductance filter circuit, second common mode inductance filter circuit, third common mode inductance filter circuit, the pumping signal of the rotary transformer decoding chip output is input to the rotary transformer after the excitation signal modulation circuit and the first common mode inductance filter circuit, the rotary transformer output cosine signal is input to the cosine signal interface of the rotary transformer decoding chip after the second common mode inductance filter circuit and the second common mode capacitance filter circuit filtering, the sinusoidal signal of the rotary transformer output is total through the third The sinusoidal signal interface of the rotary transformer decoding chip is input to after mould inductor filter circuit and the first common mode capacitance filter circuit filtering.
Description
Technical field
The utility model relates to motor driven fields, and in particular to a kind of signals of rotating transformer modulation circuit and motor drive
Dynamic system.
Background technique
As the reserves of the non-renewable energy resources such as petroleum, coal are petered out, people start to solar energy, wind-force, waterpower
These renewable energy are reasonably utilized.Wherein, wind-power electricity generation is that one kind has developed phase in new energy power generation technology
To mature technology, the emphasis as China's new energy development strategy；In automobile industry, new energy pure electric vehicle and mixed dynamic vapour
Vehicle also gradually substitutes traditional fuel-engined vehicle.
Wind power pitch-controlled system is one of critical component of wind-power electricity generation, and main function is the output work according to wind-driven generator
Rate size changes the angle of blade, to guarantee generator within rated power.Main motor driver is the pass of electric car
One of key member, main function are to receive instructing control motor operation and then driving vehicle driving for main drive controller.In order to
Guarantee the normal work of pitch-controlled system and electric car, it is necessary to accurately be measured the revolving speed of motor, so that motor is steady
Operation.Motor used in pitch-controlled system and electric car is mainly permanent magnet synchronous motor currently on the market, and permanent-magnet synchronous
It is rotary transformer that most important component part in speed devices is detected in motor.To guarantee the efficiency of wind-driven generator and electronic
The motor even running of automobile needs to guarantee the precision for the speed and position that rotary transformer measures.
Rotary transformer is mounted on the casing internal of permanent magnet synchronous motor, is connected by signal cable with motor driver,
The usual signal cable can be with power of motor cable in same wire casing interior cabling, and wiring condition is badly easy to and external power
Cable, which intercouples, to be interfered, and causes testing result the speed torque precision that deviation directly influences motor occur, causes
Motor is unable to operate normally.
Utility model content
The purpose of the utility model is to provide a kind of signals of rotating transformer modulation circuit and motor with high noise immunity
Drive system, the weak technical problem of signals of rotating transformer modulation circuit anti-interference ability to solve the prior art.
The utility model is to solve technical solution used by its technical problem:
A kind of signal modulation circuit of rotary transformer, which is characterized in that including rotary transformer decoding chip, excitation letter
Number modulation circuit, the first common mode capacitance filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit,
Two common mode inductance filter circuits, third common mode inductance filter circuit, the pumping signal of the rotary transformer decoding chip output
It successively is input to the rotary transformer after the excitation signal modulation circuit and the first common mode inductance filter circuit,
A pair of of cosine signal of the rotary transformer output is successively through the second common mode inductance filter circuit and second common mode
A pair of of cosine signal interface of the rotary transformer decoding chip, the rotation transformation are input to after capacitor filter filtering
A pair of of sinusoidal signal of device output is successively through the third common mode inductance filter circuit and the first common mode capacitance filter circuit
A pair of of sinusoidal signal interface of the rotary transformer decoding chip is input to after filtering.
Further, the signals of rotating transformer modulation circuit further includes the first differential mode capacitor C5 and the second differential mode electricity
Holding C6, the first differential mode capacitor C5 is connected between a pair of of sinusoidal signal output lead of the rotary transformer, and described the
Two differential mode capacitor C6 are connected between a pair of of cosine signal output lead of the rotary transformer.
Further, the first common mode capacitance filter circuit includes being connected to the rotary transformer decoding chip
A pair of of sinusoidal signal interface and ground between capacitor C1, C2.
Further, the second common mode capacitance filter circuit includes being connected to the rotary transformer decoding chip
A pair of of cosine signal interface and ground between capacitor C3, C4.
Further, the utility model additionally provides a kind of motor driven systems comprising motor and motor driver, institute
It states and is provided with rotary transformer in motor, the rotation being connected with the rotary transformer is provided in the motor driver and is become
Depressor signal modulation circuit, the signals of rotating transformer modulation circuit include rotary transformer decoding chip, pumping signal tune
It is circuit processed, the first common mode capacitance filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, second total
Mould inductor filter circuit, third common mode inductance filter circuit, the pumping signal of the rotary transformer decoding chip output is successively
It is input to the rotary transformer after the excitation signal modulation circuit and the first common mode inductance filter circuit, it is described
A pair of of cosine signal of rotary transformer output is successively through the second common mode inductance filter circuit and second common mode capacitance
A pair of of cosine signal interface of the rotary transformer decoding chip is input to after filter circuit filtering, the rotary transformer is defeated
A pair of of sinusoidal signal out is successively filtered through the third common mode inductance filter circuit and the first common mode capacitance filter circuit
It is input to a pair of of sinusoidal signal interface of the rotary transformer decoding chip afterwards.
Further, the signals of rotating transformer modulation circuit further includes the first differential mode capacitor C5 and the second differential mode capacitor
C6, the first differential mode capacitor C5 are connected between a pair of of sinusoidal signal output lead of the rotary transformer, and described second
Differential mode capacitor C6 is connected between a pair of of cosine signal output lead of the rotary transformer.
Further, the first common mode capacitance filter circuit includes being connected to the rotary transformer decoding chip
A pair of of sinusoidal signal interface and ground between capacitor C1, C2.
Further, the second common mode capacitance filter circuit includes being connected to the rotary transformer decoding chip
A pair of of cosine signal interface and ground between capacitor C3, C4.
Further, the motor is connected with the motor driver by the cable with shielded layer, the shielding
Layer ground connection.
Further, the positive bus-bar of the motor and negative busbar pass through Y capacitance C7 and Y capacitance C8 respectively and the motor drives
The shell of dynamic device is connected, and the ground terminal of the signals of rotating transformer modulation circuit passes through Y capacitor C9 and the motor driven
The shell of device is connected.
Compared with prior art, by adopting the above technical scheme, it is increased using in the modulation circuit of rotary transformer
First common mode capacitance filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, the filter of the second common mode inductance
Wave circuit, third common mode inductance filter circuit can effectively filter out extraneous strong jamming, peak surge inhibited to make module
Middle electronic device is not destroyed, and improves the quality of internal drive output signal of rotary transformer and return signal, enhancing rotation
The interference rejection ability of transformer output signal reaches rotary transformer analog signal and effectively transmits, and then rotary transformer decodes mould
Block can detect high-precision revolving speed and positional value, be controlled the motor in wind-driven variable pitch driver and electric car can accurately
System, effectively can reliably ensure equipment operational safety；Further, the positive bus-bar of the motor and negative busbar pass through Y electricity respectively
Hold C7 and Y capacitance C8 to be connected with the shell of the motor driver, the ground terminal of the signals of rotating transformer modulation circuit
It is connected by Y capacitance C9 with the shell of the motor driver, common mode current can be effectively reduced to reduce and be coupled to detection
Common mode disturbance voltage on circuit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the motor driven systems of the utility model embodiment.
Fig. 2 is the structural schematic diagram of the signals of rotating transformer modulation circuit in this practical Fig. 1.
Fig. 3 is the connection schematic diagram of the motor driver and motor in this practical Fig. 1.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Figure 1, the utility model embodiment provides a kind of motor driven systems comprising motor and motor driven
Device is provided with rotary transformer in the motor, is provided in the motor driver and is connected with the rotary transformer
Signals of rotating transformer modulation circuit.
As shown in Fig. 2, the signals of rotating transformer modulation circuit includes rotary transformer decoding chip, pumping signal tune
It is circuit processed, the first common mode capacitance filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, second total
Mould inductor filter circuit, third common mode inductance filter circuit, a pair of of pumping signal interface of the rotary transformer decoding chip
(EXC_P, EXC_N) exports a pair of of pumping signal and successively filters by the excitation signal modulation circuit and first common mode inductance
The rotary transformer is input to after wave circuit, a pair of of cosine signal of the rotary transformer output is successively total through described second
The rotary transformer decoding chip is input to after mould inductor filter circuit and the second common mode capacitance filter circuit filtering
A pair of of cosine signal interface (COS_P, COS_N), a pair of of sinusoidal signal of the rotary transformer output is successively through the third
The rotary transformer decoding chip is input to after common mode inductance filter circuit and the first common mode capacitance filter circuit filtering
A pair of of sinusoidal signal interface (SIN_P, SIN_N).The first common mode capacitance filter circuit includes being connected to the rotation
Change capacitor C1, C2 between a pair of of the sinusoidal signal interface and ground of depressor decoding chip.The second common mode capacitance filtered electrical
Road includes capacitor C3, the C4 being connected between a pair of of cosine signal interface of the rotary transformer decoding chip and ground.
The signals of rotating transformer modulation circuit further includes the first differential mode capacitor C5 and the second differential mode capacitor C6, and described
One differential mode capacitor C5 is connected between a pair of of sinusoidal signal output lead of the rotary transformer, the second differential mode capacitor C6
It is connected between a pair of of cosine signal output lead of the rotary transformer.
The common mode common mode inductance filter circuit and common mode capacitance filter module can will be because of the earth to the common mode between cable
Electric current flowing and the common-mode voltage generated filters out, differential mode capacitor C5, C6 can will be because caused by the signal code loops in cable
Differential mode radiation signal filters out.
Further as shown in Figure 1, the positive bus-bar BUS+ and negative busbar BUS- of the motor pass through Y capacitance C7 and Y electricity respectively
Hold C8 to be connected with the shell of the motor driver, the ground terminal of the signals of rotating transformer modulation circuit passes through Y capacitance
C9 is connected with the shell of the motor driver.Due to being easy to interfere with detection control circuit, In when power device work
Metallic film Y capacitance is connect to the driver casing on DC bus, common mode current can be effectively reduced to reduce and be coupled to inspection
Common mode disturbance voltage on slowdown monitoring circuit.
As shown in figure 3, the motor is connected with the motor driver by the cable with shielded layer.The cable
In include 6 signal wires between the signals of rotating transformer modulation circuit and the rotary transformer.The shielded layer connects
Ground.The shielding line both ends need to connect the motor driver casing and motor case respectively.Driver casing, power grid, motor
Casing needs tandem together.In the motor operation, the common mode current in the shielded layer be will increase, and lead to motor side and drive
The earthing potential at dynamic device end differs, and current potential has instantaneous pulsation between two o'clock, and revolves and exist between varying signal line and its shielded layer
Parasitic capacitance can be coupled out interference signal, above-mentioned rotary transformer on signal wire when shielded layer does not connect when signal wire both ends
The third common mode inductance filter circuit connect at input differential signal effectively can filter out the interference introduced when this shielding line does not connect.
In conclusion by adopting the above technical scheme, using increasing the first common mode in the modulation circuit of rotary transformer
Capacitor filter, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, the second common mode inductance filter circuit,
Third common mode inductance filter circuit can effectively filter out extraneous strong jamming, peak surge is inhibited to make electronics in module
Device is not destroyed, and improves the quality of internal drive output signal of rotary transformer and return signal, enhances rotary transformer
The interference rejection ability of output signal reaches rotary transformer analog signal and effectively transmits, and then rotary transformer decoder module can be examined
High-precision revolving speed and positional value are measured, control the motor in wind-driven variable pitch driver and electric car can accurately, energy
It is effectively reliable to ensure equipment operational safety；Further, the positive bus-bar of the motor and negative busbar pass through Y capacitance C7 respectively
It is connected with Y capacitance C8 with the shell of the motor driver, the ground terminal of the signals of rotating transformer modulation circuit passes through Y
Capacitor C9 is connected with the shell of the motor driver, can effectively reduce common mode current and be coupled in detection circuit to reduce
Common mode disturbance voltage.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of signal modulation circuit of rotary transformer, which is characterized in that including rotary transformer decoding chip, pumping signal
Modulation circuit, the first common mode capacitance filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, second
Common mode inductance filter circuit, third common mode inductance filter circuit, the pumping signal of rotary transformer decoding chip output according to
It is secondary to be input to the rotary transformer, institute after the excitation signal modulation circuit and the first common mode inductance filter circuit
A pair of of cosine signal of rotary transformer output is stated successively through the second common mode inductance filter circuit and second common mode electricity
A pair of of cosine signal interface of the rotary transformer decoding chip, the rotary transformer are input to after capacitor filter circuit filtering
A pair of of sinusoidal signal of output is successively filtered through the third common mode inductance filter circuit and the first common mode capacitance filter circuit
A pair of of sinusoidal signal interface of the rotary transformer decoding chip is input to after wave.
2. signals of rotating transformer modulation circuit as described in claim 1, which is characterized in that further include the first differential mode capacitor C5
A pair of of sinusoidal signal output lead of the rotary transformer is connected to the second differential mode capacitor C6, the first differential mode capacitor C5
Between, the second differential mode capacitor C6 is connected between a pair of of cosine signal output lead of the rotary transformer.
3. signals of rotating transformer modulation circuit as described in claim 1, which is characterized in that the first common mode capacitance filtering
Circuit include the capacitor C1 being connected between a pair of of sinusoidal signal interface of the rotary transformer decoding chip and ground,
C2。
4. signals of rotating transformer modulation circuit as described in claim 1, which is characterized in that the second common mode capacitance filtering
Circuit include the capacitor C3 being connected between a pair of of cosine signal interface of the rotary transformer decoding chip and ground,
C4。
5. a kind of motor driven systems, which is characterized in that including motor and motor driver, rotation is provided in the motor and is become
Depressor is provided with the signals of rotating transformer modulation circuit being connected with the rotary transformer, institute in the motor driver
Stating signals of rotating transformer modulation circuit includes rotary transformer decoding chip, excitation signal modulation circuit, the first common mode capacitance
Filter circuit, the second common mode capacitance filter circuit, the first common mode inductance filter circuit, the second common mode inductance filter circuit, third
The pumping signal of common mode inductance filter circuit, the rotary transformer decoding chip output successively passes through the excitation signal modulation
The rotary transformer, a pair of the rotary transformer output are input to after circuit and the first common mode inductance filter circuit
Cosine signal is successively input to after the second common mode inductance filter circuit and the second common mode capacitance filter circuit filtering
A pair of of cosine signal interface of the rotary transformer decoding chip, a pair of of sinusoidal signal of the rotary transformer output is successively
The rotation transformation is input to after the third common mode inductance filter circuit and the first common mode capacitance filter circuit filtering
A pair of of sinusoidal signal interface of device decoding chip.
6. motor driven systems as claimed in claim 5, which is characterized in that the signals of rotating transformer modulation circuit also wraps
It includes the first differential mode capacitor C5 and the second differential mode capacitor C6, the first differential mode capacitor C5 is connected to a pair of the rotary transformer
Between sinusoidal signal output lead, the second differential mode capacitor C6 is connected to a pair of of cosine signal output of the rotary transformer
Between lead.
7. motor driven systems as claimed in claim 5, which is characterized in that the first common mode capacitance filter circuit includes point
Capacitor C1, the C2 not being connected between a pair of of sinusoidal signal interface of the rotary transformer decoding chip and ground.
8. motor driven systems as claimed in claim 5, which is characterized in that the second common mode capacitance filter circuit includes point
Capacitor C3, the C4 not being connected between a pair of of cosine signal interface of the rotary transformer decoding chip and ground.
9. motor driven systems as claimed in claim 5, which is characterized in that the motor and the motor driver pass through tool
There is the cable of shielded layer to be connected, the shielding layer grounding.
10. motor driven systems as claimed in claim 5, which is characterized in that the positive bus-bar and negative busbar of the motor are distinguished
It is connected by Y capacitance C7 and Y capacitance C8 with the shell of the motor driver, the signals of rotating transformer modulation circuit
Ground terminal is connected by Y capacitance C9 with the shell of the motor driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040569.9U CN209676108U (en) | 2019-01-10 | 2019-01-10 | A kind of signals of rotating transformer modulation circuit and motor driven systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920040569.9U CN209676108U (en) | 2019-01-10 | 2019-01-10 | A kind of signals of rotating transformer modulation circuit and motor driven systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209676108U true CN209676108U (en) | 2019-11-22 |
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ID=68565259
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920040569.9U Active CN209676108U (en) | 2019-01-10 | 2019-01-10 | A kind of signals of rotating transformer modulation circuit and motor driven systems |
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| Country | Link |
|---|---|
| CN (1) | CN209676108U (en) |
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2019
- 2019-01-10 CN CN201920040569.9U patent/CN209676108U/en active Active
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